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X.440�:�Message handling systems: Voice messaging system �

Recommendation X.440

In force components
Number
 Title Status
X.440 (06/99)
� 		Message handling systems: Voice messaging system � In force
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�
Superseded and Withdrawn components
Number
 Title Status
X.440 (09/92)
� 		Message handling systems: Voice messaging system � Superseded
X.440 (1992) Amendment 1 (11/95)
� 		Annex H: Mapping of G.721 (1988) and G.728 (1992) into the data component of a voice body part � Superseded

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